to clean the carbon off the pistons, i was told you can take a mixture on brake fiuld and water and pour down your carb. until the truck alomst dies, it will smoke, and stink to high heaven, but will remove carbon off the pistons. a friend of mine told me about this, said he had done it before, but i don't like the sound of it too much myself :confused:
but i would change plugs, put in some of the nice 3-4 prong plugs so if that helps, maybe get "shallower plugs" some that don't thread way way in
